501390947 has 8 divisors (see below), whose sum is σ = 521791200. Its totient is φ = 481198144.

The previous prime is 501390941. The next prime is 501390997. The reversal of 501390947 is 749093105.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 501390947 - 2²⁶ = 434282083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 501390947.

It is not an unprimeable number, because it can be changed into a prime (501390941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46922 + ... + 56607.

It is an arithmetic number, because the mean of its divisors is an integer number (65223900).

Almost surely, 2^501390947 is an apocalyptic number.

501390947 is a deficient number, since it is larger than the sum of its proper divisors (20400253).

501390947 is a wasteful number, since it uses less digits than its factorization.

501390947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103725.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 501390947 is about 22391.7606945055. The cubic root of 501390947 is about 794.4358414588.

The spelling of 501390947 in words is "five hundred one million, three hundred ninety thousand, nine hundred forty-seven".